Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
Well the womans egg cells get fertitlize d(a baby will form) from the sperm which came from the guy
lmaooooo I hate dis shiiiii
Correct answer is ... Seeds have endosperm which provides nourishment for a new plant, but spores do not have any stored food supplies. :)
Could you say the sun rises in the east ? I’m not too sure though
Answer:
a
Explanation:
it is a because nematodes belong to a category of animals
